Refactor syscall tests

- Move shared helpers V4Multicast and V4Broadcast to socket_test_util
- Add unnamed namespace so socket_ipv4_tcp_unbound_external_networking_test.cc
  and socket_ipv4_udp_unbound_external_networking_test.cc can be compiled
  together
- Add test files to "exports_files" so they can be included by Fuchsia's syscall
  test setup

PiperOrigin-RevId: 293880429

1 files changed, 18 insertions, 0 deletions

diff --git a/test/syscalls/linux/socket_test_util.cc b/test/syscalls/linux/socket_test_util.cc
index c0c5ab3fe..5d3a39868 100644
--- a/test/syscalls/linux/socket_test_util.cc
+++ b/test/syscalls/linux/socket_test_util.cc
@@ -805,6 +805,24 @@ TestAddress V4MappedLoopback() {
   return t;
 }
 
+TestAddress V4Multicast() {
+  TestAddress t("V4Multicast");
+  t.addr.ss_family = AF_INET;
+  t.addr_len = sizeof(sockaddr_in);
+  reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr =
+      inet_addr(kMulticastAddress);
+  return t;
+}
+
+TestAddress V4Broadcast() {
+  TestAddress t("V4Broadcast");
+  t.addr.ss_family = AF_INET;
+  t.addr_len = sizeof(sockaddr_in);
+  reinterpret_cast<sockaddr_in*>(&t.addr)->sin_addr.s_addr =
+      htonl(INADDR_BROADCAST);
+  return t;
+}
+
 TestAddress V6Any() {
   TestAddress t("V6Any");
   t.addr.ss_family = AF_INET6;